40 uphill
100 downhill
never been beat! EVER!

Oh yea, my major mod is a car pushing me at extremely high speeds....with a helmet of course. lol

 

I dont know, in the 2 years I have used Garmin GPS I havnt had a single issue with speed not being correct. GPS is even better in the last 6 months or so with the SA removed. I would have to say a good GPS will give a very acurate reading. Maybe I just got a good one?

 

The previous owner of my 87 Quadracer 500 gave me time slips to prove a 94mph 1/8 mile ice-drag run......FMF pipe, silencer, reed cage, head shaved .010, bored .060........and its only gonna get faster[img]i/expressions/face-icon-small-smile.gif[/img] (I hope)

 

I've hit anywhere from 81.0 - 84.2 on my GPS with my Raptor, depending on the day/temp/tire pressure.

I hit 67.8 with the Jetski too!!

 

I hit 53 goin downhill on my 2001 Rancher with 26inch vamps on all 4's.47 stait flat land

 

Andy Dirt publishing says their readings on the grizzly are around 67, now that's usually a optimistic/revved out reading, but it doesn't sound too far off either. The 60 reading actually sounds a bit low on yours.


Mudman2k1 My rancher readings are really close to that even with stock rubber, with a good run out it tacks out at 51 downhill, but a more usual cruise is about 46 on flat, level, packed grass. I guess it's just a case of the motor running out of breath, since taller gearing through bigger tires doesn't help it much.

 

I hit an indicated 186mph all the time. Actual speed mid 170's.........on my GSXR lol

 

I have gotten both of my 2002 Big Bear 400 2x4's up to 51. Same with a 2000 Big Bear 400 4x4.

 

I raced my neighbor's Suzuki 600 street bike with my pro-flow filtered White brothers E-series piped Raptor with stage 3 Dynojet kit and topped out at 90 mph according to his speedo. By the way, I beat him off the line until 3rd gear when he left me like I was sitting still.

P.S. We were not going downhill.

 

my blaster has hit 60 going down my road